The Web sites of American Eagle and JC Penney suffered the worst outages of the holiday season including Black Friday, with major sites such as Amazon.com succeeding perfectly, according to a site uptime survey.

The Saturday report by WatchMouse indicated that Americaneagle.com reported uptimes of just 64 percent on Nov. 25 and just 62 percent on Nov. 26, otherwise known as “Black Friday”. JCpenney.com also suffered an apparently outage, with just 78 percent uptime on Black Friday.

Fry’s Electronics also had problems, with uptimes between 90 and 96 percent between Nov. 24 and 26. Office Max and Toys ‘R’ Us, meanwhile, struggled a bit on Thanksgiving, with uptimes of about 98 percent or above.

In general, however, the top 100 Web shopping sites that WatchMouse monitored showed perfect or near-perfect uptimes, meaning that they didn’t lose revenue during the peak holiday shopping season.

“We tested these mega online retail sites to see how they faired [sic] leading up to and including Thanksgiving and Black Friday, two of most heavily-trafficked online shopping days of the year,” said Mark Pors, CTO and co-founder of WatchMouse, in a statement. “The impact that a quick and reliable site can have on business is becoming hard to ignore, and downtime is becoming more and more inexcusable. Fortunately, we found that the majority of these sites had excellent uptime and page load speed, and met the industry standard of 99.9% or greater.”

Twenty-seven of the 100 sites recorded 100 percent uptime from October 28 through November 27, 2010, with 15 coming in at 99.99 percent. WatchMouse placed American Eagle, GiltGroupe, Footlocker.com and Fry’s Electronics in the “unacceptable” category.

Every site that WatchMouse monitored performed perfectly on Saturday, except one: Williams-Sonoma, which experienced uptimes of about 98 percent for the last four days.

One of the WatchMouse monitoring stations retrieved the homepage of the site every 5 minutes, without graphics, and frames. Each HTML page was expected to download within 8 seconds, without any errors. If that time was exceeded, it was verified by one of the other WatchMouse monitoring stations, the firm said.